-to find a conclusion,
-to produce a conclusion,
-to attain a conclusion.
Or we only 'reach to' and 'jump to' a 'conclusion'?
Arrive at a conclusion is another one that occurs to me.
My mother always jumps to the conclusion that I am not being honest with her.
We only reached an acceptable conclusion after weeks of research.
The committee has not been able to find a conclusion that satisfies everyone.
The police officer saw the blood on my face and jumped to the conclusion that I had been attacked.
Hope this helps.
People are waiting to help.